Bump pygit2 from 0.28.2 to 1.6.1

[dependabot-preview[bot]]

Bumps pygit2 from 0.28.2 to 1.6.1.

Changelog

Sourced from pygit2's changelog.

1.6.1 (2021-06-19)

• Fix a number of reference leaks
• Review custom object backends

Breaking changes:

• In custom backends the callbacks have been renamed from read to read_cb, write to write_cb, and so on.

1.6.0 (2021-06-01)

• New optional proxy argument in Remote methods #642 #1063 #1069
• New GIT_MERGE_PREFERENCE constants #1071
• Don't require cached-property with Python 3.8 or later #1066
• Add wheels for aarch64 #1077 #1078
• Documentation fixes #1068 #1072
• Refactored build and CI, new build.sh script

Breaking changes:

• Remove deprecated GIT_CREDTYPE_XXX contants, use GIT_CREDENTIAL_XXX instead.
• Remove deprecated Patch.patch getter, use Patch.text instead.

1.5.0 (2021-01-23)

• New PackBuilder class and Repository.pack(...) #1048
• New Config.delete_multivar(...) #1056
• New Repository.is_shallow #1058
• New optional message argument in Repository.create_reference(...) #1061 #1062
• Fix truncated diff when there are nulls #1047 #1043
• Unit tests & Continuous integration #1039 #1052

Breaking changes:

• Fix Index.add(...) raise TypeError instead of AttributeError when arguments are of unexpected type

1.4.0 (2020-11-06)

• Upgrade to libgit2 1.1, new GIT_BLAME_IGNORE_WHITESPACE constant #1040
• Add wheels for Python 3.9 #1038
• Drop support for PyPy3 7.2
• New optional flags argument in Repository.__init__(...), new GIT_REPOSITORY_OPEN_* constants #1044
• Documentation #509 #752 #1037 #1045

1.3.0 (2020-09-18)

... (truncated)

Commits

• e2c0fdb Release 1.6.1
• 712b5bd Fix reference leak in submodules
• 64e9acd Review custom object backends
• 8a1fc7f Custom backends, not found is an expected condition
• dc56024 Fix reference leak in custom object backends
• 5ce0843 Fixing reference leak in custom object backends
• 8b54b3d Fix reference leak in OdbBackend_read_prefix
• 3b415ad Update Makefile to use build.sh
• 227fc6c Fix reference leak in OdbBackend_build_as_iter
• 134ae28 Fix reference leak in Repository.notes(..)
• Additional commits viewable in compare view

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[taylorjacklespriggs]

https://github.com/presslabs/gitfs/pull/379 includes this change